Production of caoutchouc-like bodies.



HERMANN STERN, OF MUNICH, GERMANY.

PRODUCTION OF CAOUTCHOUC-LIKE BODIES.'

Specification of Letters Patent.

Patented Mar. 13, 1917.

No Drawing. Original application filed July 17, 1914, Serial No.851,486. Divided and this application filed July 30, 191 5. Serial No.42,791.

To all whom it may concern:

Be it known that I, HERMANN STERN, a subject of the German -Emp'eror,residing at Munich, in the Kingdom of Bavaria, German Empire, haveinvented-certain new and useful Improvements in the Production ofCaoutchouc-like Bodies, of which the following isa specification.

This invention relates to the production of a vulcanized caoutchouc-likebody and consists essentially in causing sulfur dichlorid to react on aketone, or a mixture of a ketone and an aliphatic alcohol or analiphatic ether. The present application is a division of my co-pendingapplication for patent filed July 17, 1914, Serial Number 851,486. a

In place of a simple ketone a mixed or compound ketone may be used orseveral simple or several mixed or compound ketones may be used as wellas a mixture of simple ketones with mixed 01: compound ketones. To theketones used. may also be added an aliphatic ether'or an aliphaticalcohol. The reaction between the sulfur di-' chlorid and the ketone orthe mixtures containing ketone is very powerful Therefore, in order toprevent the reaction from becoming too violent, the sulfur dichlorid maybe added in very small quantities at a time, or the mixture may becooled during the reaction.

The following example will illustrate how a vulcanized caoutchouc-likebody may e made according to this process.

About 6.75 kilograms of sulfur dichlorid is added in small quantities toa mixture of 4.6 kilograms of alcohol and 5.8 kilograms of acetone. Atthe commencement of the reaction cooling may be applied if foundnecessary, and a reflux condenser naybeused for this purpose. By thereaction a lump of vulcanized caoutchouc-.

like body is produced. weighing about 10 kilograms. It is separated fromany remaining liquid, -is then neutralized and is ready for use. ether,benzene and chloroform.

This product is useful in the rubber in- Y dustry being used with nativerubber, in this respect taln'ng the place of the Varioussulfochlorinated oils now in use, being superior to the latter inelasticity and tensile stren h.

The ketones and alcohols used in carrying out the present invention arethose which are liquid at ordinary temperature.

What I claim as new is 1. In the art of making a vulcanizedcaoutchouc-like body, the improvement which consists in adding dichloridof sulfur to a mixture containing a ketone capable of It is insoluble inalcohol,

yielding isoprene and 'caoutchouc and allowing the two bodies to reacton each other. 2. In the art of making a vulcanized caoutchouc likebody, the improvement which consists in adding sulfur dichlorid to aketone and an alcohol and allowing said bodies to react on each other.

In testimony whereof I have hereunto aflixed my signature in presence oftwo witnesses.

HERMANN STERN. Witnesses:

W. S. SPIEGELBERG, ARTHUR GUBE.

